Look at how light-hearted most war stories are. A pile of bodies later and the good guys win. No moral ambiguity, no post traumatic stress disorder, no lasting repercussions from injuries, no mention of the widows, orphans, childless parents, and general mayhem left in the hero's wake.
The truth of the matter is that you can go grim dark for any topic. By in large, that just is not what people want. You're only noticing it because this topic is important to you. I'm not saying it isn't an important topic, but the way things work either we all speak or none of us do.
Fortunately that right to speak freely mean that we can call these people a bunch of tasteless fucking retards.